WASHINGTON (CNN) -- Key members of the original 9/11 Commission are banding together to rekindle the sense of urgency felt after the 2001 attacks and pressure the government to act on the commission's unfinished business.

Former 9/11 Commission co-chairs Lee Hamilton, left, and Thomas Kean, in file photo, are leading new group.

The new group, headed by 9/11 Commission co-chairs Thomas Kean and Lee Hamilton, said Congress has adopted about 80 percent of the recommendations, made five years ago in the commission's landmark report, but has left troublesome security gaps.

"I look forward to a very vigorous relationship with this group to provide advice, to provide thought and to help us as we continue to move forward," Napolitano said.

The Bipartisan Policy Center, a nonprofit organization formed in 2007 by former Senate Majority Leaders Howard Baker, Tom Daschle, Bob Dole and George Mitchell, brought the group together to address policy challenges.

The NSPG said it also will focus on the evolving threat of terrorism. Kean said that the threat of cyber attacks has increased since the 9/11 Commission issued its report.